Patents for J. P. Theodore Lang


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Patents for J. P. Theodore Lang
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	79,767	Jul. 07, 1868	J.T. Lang	Improvement in Screw Cutting Lathes
	193,088	Jul. 17, 1877	B. Holly	Improvement in Street Mains or Pipes for Supplying Large Districts with Heat for Warming Buildings